Even armed forces comprising automated infantry requires extensive resupply. The droid armies of the Separatists rely on a well-protected supply chain made of converted corporate transport vessels. Huge ships, like the barbell-shaped transport craft or the heavily-armed Trade Federation battleships, ferry in reinforcements, power supplies, weaponry and other essential materiel to the front. As more and more worlds take up the banner of the Separatist Alliance to do battle with the Republic, the Confederacy military has been bolstered by flesh-and-blood warriors, like the natives of Umbara or Mon Cala. These require different replenishment needs, leading to a growth of the Separatist supply fleet through a variety of transport vessels.